Fig. 4: The universality of other alcohol, aldehyde and ketone substrates.

1H NMR spectra of (a) pure benzoic acid and self-prepared benzoic acid obtained from benzyl alcohol and benzaldehyde, (b) pure furoic acid and self-prepared furoic acid obtained from furfuryl alcohol and furfural, and (c) pure adipic acid and self-prepared adipic acid obtained from cyclohexanol and cyclohexanone. a. u. arbitrary units.